Date: Wed, 29 May 2013 12:49:46 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Ajit Jain" <ajit.jain@cloudbyte.com> Cc: freebsd-fs <freebsd-fs@freebsd.org> Subject: Re: seeing data corruption with zfs trim functionality Message-ID: <2C2F5CAAE72B4658BFA09E4694A21375@multiplay.co.uk> References: <CAA71u6Y5dKZ9O0rqxCpx-9t7DYgTnPZSoNy-iHOnmzrOUYp%2Bvw@mail.gmail.com> <60316751643743738AB83DABC6A5934B@multiplay.co.uk> <20130429105143.GA1492@icarus.home.lan> <3AD1AB31003D49B2BF2EA7DD411B38A2@multiplay.co.uk> <C6AA4D0A7C49469ABB3C7440B1BCC108@multiplay.co.uk> <CAA71u6Zh7BbbdC=utqfR2MD1Nn=9euUDXHKqqu9NyBG-Jx%2B=Ow@mail.gmail.com> <9681E07546D348168052D4FC5365B4CD@multiplay.co.uk> <CAA71u6ZuO9CF0ECFS4z07-E5qPea-6SfNwkvhr_g6pFT5MV5yQ@mail.gmail.com> <CAA71u6YKGHDRVg6W_xnCNaA68bJvAZ2Lkp-UisiPqb1vKjJhfA@mail.gmail.com> <3E9CA9334E6F433A8F135ACD5C237340@multiplay.co.uk> <CAA71u6YZAKrmfTLU32f8UmYecmydwiqRT-OrR1ukZ9V6PGsU%2Bw@mail.gmail.com> <A05ACD84EB974E80B7142CE9982E479C@multiplay.co.uk> <93D0677B373A452BAF58C8EA6823783D@multiplay.co.uk> <CAA71u6bZ_4fb9FxYSwcrHBBApkZog30iQJGyTERi-xFMksud1g@mail.gmail.com> <35ABA7AAEB7F4D86A1ED54C4C47FEB49@multiplay.co.uk> <CAA71u6ahzRai=uUp5L6nDQxxEZC=d5jd4jBBfPNa2k29OwTZDg@mail.gmail.com>
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Sorry to pester, but any update on this Ajit?
I ask as its currently blocking the MFC of TRIM to stable/8 & 9 and I've been
unable to reproduce this issue even with your testing code on working FW
versions.
Regards
Steve
----- Original Message -----
From: "Ajit Jain" <ajit.jain@cloudbyte.com>
> Sure Steven,
> I'll apply the patches and update ASAP.
>
> thanks
> ajit
>
>
> On Thu, May 23, 2013 at 3:03 PM, Steven Hartland <killing@multiplay.co.uk>wrote:
>
>> I've attacked the two patch sets I'm looking to MFC to stable-9, one
>> adds BIO_DELETE CAM changes and the other is ZFS TRIM support.
>>
>> They should both apply cleanly to stable-9, if you could test with
>> those on your machine and let me know.
>>
>> Regards
>> Steve
>>
>> ----- Original Message ----- From: "Ajit Jain" <ajit.jain@cloudbyte.com>
>>
>>
>> Hi Steven,
>>>
>>> FW version on the setup is P15.
>>> I will upgrade the FW to P16, but I think my
>>> best bet will be to update code base to 9 stable as unlike you,
>>> I was seeing corruption for all three delete methods.
>>>
>>> thanks
>>> ajit
>>>
>>> On Sat, May 18, 2013 at 4:15 AM, Steven Hartland <killing@multiplay.co.uk
>>> >**wrote:
>>>
>>> ----- Original Message ----- From: "Steven Hartland" <
>>>> killing@multiplay.co.uk>
>>>>
>>>>
>>>> After initially seeing not issues, our overnight monitoring started
>>>>> moaning
>>>>> big time on the test box. So we checked and there was zpool corruption
>>>>> as
>>>>> well
>>>>> as a missing boot loader and a corrupt GPT, so I believe we have
>>>>> reproduced
>>>>> your issue.
>>>>>
>>>>> After recovering the machine I created 3 pools on 3 different disks each
>>>>> running a different delete_method.
>>>>>
>>>>> We then re-ran the tests which resulted in the pool running with
>>>>> delete_method
>>>>> WS16 being so broken it had suspended IO. A reboot resulted in it once
>>>>> again
>>>>> reporting no partition table via gpart.
>>>>>
>>>>> A third test run again produced a corrupt pool for WS16.
>>>>>
>>>>> I've conducted a preliminary review of the CAM WS16 code path along with
>>>>> SBC-3
>>>>> spec which didn't identify any obvious issues.
>>>>>
>>>>> Given we're both using LSI 2008 based controllers it could be FW issue
>>>>> specific
>>>>> to WS16 but that's just speculation atm, so I'll continue to
>>>>> investigate.
>>>>>
>>>>> If you could re-test you end without using WS16 to see if you can
>>>>> reproduce the
>>>>> problem with either UNMAP or ATA_TRIM that would be a very useful data
>>>>> point.
>>>>>
>>>>>
>>>> After much playing I narrow down a test case of one delete which was
>>>> causing
>>>> disc corruption for us (deleted the partition table instead of data in
>>>> the middle of the disk).
>>>>
>>>> The conclusion is LSI 2008 HBA with FW below P13 will eat the data on
>>>> your
>>>> SATA
>>>> disks if you use WS16 due to the following bug:-
>>>> SCGCQ00230159 (DFCT) - Write same command to a SATA drive that doesn't
>>>> support
>>>> SCT write same may write wrong region.
>>>>
>>>> After updating here to P16, which we would generally be running, but test
>>>> box
>>>> was new and hadnt updated yet the corruption issue is no longer
>>>> reproducable.
>>>>
>>>> So Ajit please check your FW version, I'm hoping to here your on
>>>> something
>>>> below P13, P12 possibly?
>>>>
>>>> If so then this is your issue, to fix simply update to P16 and the
>>>> problem
>>>> should be gone.
>>>>
>>>>
>>>> Regards
>>>> Steve
>>>>
>>>>
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>>>
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